Excuse me, untapped is a word but untap isn’t? How am I supposed to fix this problem I have here with all of this jarred potential I have lying around. Unjar isn’t a word either.
Not to mention a symbol, too--and not to go too deep, but further relevant to his past career looking into these things, the symbol's codeletter is, of course, Q.
scryfall.com/card/eve/100...
Back when Object-Oriented Programming was just coming into vogue we were taught that you interacted with the objects by sending them messages. Design of this was important. Assume a Cow object which provides a Milk object. A possible message was Milk.UnCow_Yourself. So Untap is fine.
You can't untap a keg, you can only tap it,... unless you have untapped skills we don't know about. 😏
That's the only use of 'untapped' that I know of.